Can I run DeepSeek-V4-Flash on a Apple M5 Max?
Not at these settings. No indexed quantization of DeepSeek-V4-Flash fits Apple M5 Max at any context we compute, with q8_0 KV. The smallest shipped quantization is 76.87 GiB in weights alone, against 33.48 GiB usable. CPU offload can still run it, slowly.
Every quantization at every context
| Quant | Weights● | 4K◐ | 8K◐ | 16K◐ | 32K◐ | 64K◐ | 128K◐ |
|---|---|---|---|---|---|---|---|
| Q4_K | 153.33 GiB | 154.0 | 154.0 | 154.0 | 154.0 | 154.0 | 154.0 |
| MXFP4 | 145.29 GiB | 145.9 | 145.9 | 145.9 | 145.9 | 145.9 | 145.9 |
| UD-IQ4_NL | 128.43 GiB | 129.1 | 129.1 | 129.1 | 129.1 | 129.1 | 129.1 |
| UD-IQ4_XS | 128.43 GiB | 129.1 | 129.1 | 129.1 | 129.1 | 129.1 | 129.1 |
| UD-Q3_K_M | 120.44 GiB | 121.1 | 121.1 | 121.1 | 121.1 | 121.1 | 121.1 |
| UD-IQ3_S | 109.25 GiB | 109.9 | 109.9 | 109.9 | 109.9 | 109.9 | 109.9 |
| UD-IQ3_XXS | 95.93 GiB | 96.6 | 96.6 | 96.6 | 96.6 | 96.6 | 96.6 |
| Q2_K | 92.86 GiB | 93.5 | 93.5 | 93.5 | 93.5 | 93.5 | 93.5 |
| UD-IQ2_M | 84.68 GiB | 85.3 | 85.3 | 85.3 | 85.3 | 85.3 | 85.3 |
| UD-IQ2_XXS | 84.62 GiB | 85.3 | 85.3 | 85.3 | 85.3 | 85.3 | 85.3 |
| UD-IQ1_M | 80.93 GiB | 81.6 | 81.6 | 81.6 | 81.6 | 81.6 | 81.6 |
| UD-IQ1_S | 76.87 GiB | 77.5 | 77.5 | 77.5 | 77.5 | 77.5 | 77.5 |
Figures are GiB of total memory: weights plus KV cache plus compute buffer and backend overhead. Weights and KV are near-exact; the overhead term is modeled. Hover any cell for the breakdown.
Why other calculators disagree
A parameters × bits ÷ 8 estimate ignores two things that dominate at long context. First, the weights themselves are not the nominal rate — quantizations are mixtures, so the real file is consistently larger than the label implies. Second, most of this model's layers cache only a 128-token window rather than the full context.